Method of attaching slates to roofs



(No Model.)

G. MARTIN.

METHOD OF ATTAGHING SLATES T0 ROOFS.

No. 313,506. Patented Mar. 10, 1885.

UNITED STATES PATENT Trice.

GEORGE MARTIN, OF BOSTON, MASSACHUSETTS.

METHOD OF ATTACHING SLATES TO ROOFS.

SPECIFICATION forming part of Letters Patent No. 313,506, dated March 10, 1885.

Application filed October 6, 1884.

To all whom it may concern:

Be it known that I, GEORGE MARTIN, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Method of Attaching Slates to Roofs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a perspective view of a portion of a roof with my invention applied thereto. Fig. 2 is a view of the fastening device applied to a purlin.

My'invention relates to a novel method of securing slates to iron roofs; and it consists in a fastening device composed of spring metal,

one end of which is provided with an eye or loop, through which the bent end of the nail which passes through the slate is caught and held while the opposite end is sprung over' the edge of the purlin, as will be hereinafter more fully set forth and specifically claimed.

In the drawings, A represents the purlins, angle or T irons upon which the slates B rest, these slates being provided with countersunk holes, through which pass the nails a, these nails being each provided with heads countersunk flush with the upper surface of the slates, the lower ends of these nails being turned up, forming a loop, which is caught into the eye I) of a fastening or locking device,

0, of spring metal, of the form sh own in Fig.2.

This fastening device is shaped and operates in the following manner: Passing from the eye I), it runs in a horizontal plane with the purlin for a short distance, where it is bentdown at 0 and then bent at d, and runs transversely across the under side of the purlin, against which it bears. From thence it passes upward, and is bent again horizontally with the purlin to a point, e, where it is bent in the form of a loop, f, the lower portion of this loop resting upon the upper portion, g, of the pur- (N'o model.)

lin. From thence it passes in a horizontal plane, or nearly so, with the edge of the purlin to the point h, where it is bent inward at i and rests upon the portion 9 of the purlin.

When it is desired to attach a slate to a roof, the looped nail is first passed through the hole made for it in the slate. The spring fastening device 0 is then held in the hand with the loop portion f uppermost. It is then passed around the under surface of the purlin, the space between the eye b and the loop portion f affording ample room for this purpose. It is then turned in a plane parallel with the purlin, and theturned or looped portion of the nail caught into the eye b, when the end i can then be sprung over the portion g of the purlin, and thus securely hold the slate in place with a spring-pressure.

By making the fastening device of spring metal it is evident that the slates will not be broken or cracked, as has heretofore been the 6 5 case with a rigid fastening, owing to the expansion and contraction of the iron of which the roof is composed, as my device will allow of a spring-pressure to be at all times exerted upon the slate, no matter how much the iron of which the roof is composed expands or contracts, thus obviating the necessity of frequent repairsand rendering the slates more durable.

What I claim as my invention, and desire to secure by Letters Patent, is

The herein-described means of securing slates to roofs, the same consisting of a spring fastening device, one end of which is adapted to catch over the purlin, while its opposite end is provided with an eye, which holds the upturned end of the nail which passes through the slate, all combined and operating substantially as set forth.

GEORGE MARTIN.

Witnesses:

JOHN MAY, H. E. SMITH. 

